Steam-boiler



(No Model.)

T. GUNNING.

STEAM BOILER.

N0..571,660. Patented Nov. 17, 1896.

Swuamtoz UNITED STATES PATENT EEicE.

THOMAS GUNNING, OF PITTSBURG, PENNSYLVANL-i.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 571,660, dated November 17', 1896.

Application filed February 10, 1896. Serial No. 578,764. ill'o model.-

To (LZZ whom, it may concern:

Be it known that I, THOMAS GUNNING, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Steam-Boilers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention contemplates certain new and useful improvements in steam-boilers.

It has for its object to provide for the constant agitation of the sediment in the boiler,- whereby the same may be prevented from adhering therein, thus increasing the horsepower of the boiler and resulting in a great saving of fuel.

A further object is the production of simple and highly efficient means of maintaining the temperature of the mud-drum at or about the same as that of the boiler or steamdomc, thereby allowing for the expansion of the mud-drum. Ordinarily the mud-drums of steam-boilers are usually kept at a lower temperature than the boilers, the heat not coming directly in contact therewith. In consequence there is no allowance for expansion and contraction of the mud-drums, and the sediment collected in the latter adheres to the sides or walls thereof. Hence the muddruins quickly wear out and their serviceability is quicklyimpaired. By means of my invention the mud-drums will last as long as the boilers, and the sediment therein and with-in the boiler being constantly agitated is prevented from settling and adhering to the walls of the drum and boiler.

These objects I accomplish by means of a pipe or pipes leading from the mud-drum at a point about on a line with the center of the latter and up around the side of the boiler through the line of passage of the products of combustion and opening into the steamspace of the boiler or the dome of thelatter, whereby constant circulation between the mud-drum and the top of the boiler is had, and the temperature of said mud-drum is maintained at about the same as that of the steam space or dome of the boiler and sediment is prevented from settling in the boiler. A blow-off pipe is occasionally opened to permit of the mud and the like being expelled.

The invention will be hereinafter fully set forth, and particularly pointed out in the claim.

In the accompanying drawings, Figure 1 is a view in side elevation, parts being shown broken away, of a boiler constructed in accordance with my improvements. Fig. 2 is a detail section on line 1 1, Fig. 1.

Referring to the drawings, A designates a steam-boiler which may be of any preferred construction, a the steam-dome, and a" the inclosiug wall or housing, preferably formed of brick.

B is a mud-drum located within the lower portion of the housing and communicating with the boiler A by vertical pipes I). From this mud-drum leads a blow-off pipe Z).

13 designates a right-angular pipe, which at its lower end opens into the -steanrspace of the boiler and at its upper end into the dome a. In this pipe are upper and lower valves b 71 C is a pipe which leads diagonally from the pipe B at a point between the valve thereof and opens at its lower end into the mu d-druin B at a point about on a line with the center of the latter. Steam is admitted from this pipe into the dome by opening the valve Z2 and closing valve Z1 or with the latter open and the former closed steam will pass to the steam-space of the boiler. Thus circulation can be constantly passing from the mud-drum to the boiler, thereby keeping the temperature of the latter the same as the boiler. This circulation-pipe passes up on the out side of the boiler through the line of passage of the products of combustion, and being directly acted upon and entirely surrounded by l the latter the water in said pipe, which is at the same level as the water in. the boiler, is quickly heated to a high degree, and the steam constantly generated therefrom passes through the upper portion of the pipe into the steam-dome of the boiler-shell or directly into the steam-space of the latter, and as the steam is generated in the pipe the water 0011- tinues to rise therein, remaining always at the same level as the Water in the boiler, the supply being directly from the mud-drum. By thus creating a continuous circulation between the mud-drum and the boiler the temperature of the mud-drum is raised to that of the steam-dome and the constant circulation serves to keep the sediment in the drum continuously agitated and prevents the same from lodging or adhering to the Walls of said drum.

The advantages of my invention are apparent to those skilled in the art, and it Will be observed that I have provided extremely simple means whereby the mud-dru1n can be maintained at the same temperature as the steamdome, thereby allowing for the expansion and contraction of the latter and resulting in prolonging the utility of the mud-drum, and also by reason of this constant circulation sediment is prevented from accumulating on the Walls of the drum and boiler, the horse-power of the boiler is increased, and a saving in fuel is efiected. l

I claim as my invention The combination with a boiler having a steam-dome,and a mud-drum connecting Wl th said boiler, of an angular pipe opening at its ends in said dome and also in the steam-space of the boiler, a valve or valves in said angular pipe, and a pipe leading from said mud-drum into said angular pipe, whereby a constant circulation between said mud-dru m and boiler may be maintained, substantially as and for the purpose set forth.

In testimony whereof I have signed this specification in the presence of two subscribing Witnesses.

THOMAS GUNNING.

\Vitnesses:

CHARLES E. RANKIN, CHARLES H. RHODES. 

